WKWebView 综合使用

.h

@property (nonatomic, strong) NSString *webUrl;

.m

#import "UIBarButtonItem+Item.h"
#import <WebKit/WebKit.h>
#import <JavaScriptCore/JavaScriptCore.h>

@property (nonatomic, strong) WKWebView *webView;
/** 返回按钮图片名 **/
@property (nonatomic, strong) NSString *backImageName;
/** 导航栏返回字体颜色 */
@property (nonatomic, strong) UIColor *navColor;

@implementation WebViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    [self getUi];
}
- (void)back{
    if ([self.webView canGoBack]) {
        /// 网页可以返回 就进行网页返回
        [self.webView goBack];
    } else{
        [self.navigationController  popViewControllerAnimated:YES];
    }
}

- (void)backLatst{
     [self.navigationController  popViewControllerAnimated:YES];
}
- (void)getUi{
    self.view.backgroundColor = COLOR(whiteColor);
    [self.view addSubview:self.webView];
    self.backImageName = @"白色返回";
    UIColor *navBackColor = [UIColor new];
    CGFloat lineHeight = 0;
    self.navColor = COLOR(whiteColor);
    if (self.navigationController.navigationBar.barTintColor == COLOR(whiteColor) ) {
        self.backImageName = @"返回";
        self.navColor = GetColorWithHexadecimal(0x111111, 1);
        UIView *view = [[UIView alloc]initWithFrame:CGRectMake(0, 0, MAINSCREEN_WIDTH, 0.5)];
        view.backgroundColor = GetColorWithHexadecimal(0xd0d0d0, 1);
        [self.view addSubview:view];
        lineHeight = 0.5;
    }
    UIBarButtonItem *item = [UIBarButtonItem backItemWithImage:IMGNAME(self.backImageName) titleColor:self.navColor addTarget:self action:@selector(back) edgInsetStyle:MKButtonEdgeInsetsStyleLeft title:@"返回"];
    self.navigationItem.leftBarButtonItem = item;
    [self.webView mas_makeConstraints:^(MASConstraintMaker *make) {
        MLEFT(0);
        MRIGHT(0);
        MBOTTON(0);
        MTOP(lineHeight);
    }];
    self.navigationController.navigationBar.tintColor = COLOR(whiteColor);
}

- (WKWebView *)webView:(WKWebView *)webView createWebViewWithConfiguration:(WKWebViewConfiguration *)configuration forNavigationAction:(WKNavigationAction *)navigationAction windowFeatures:(WKWindowFeatures *)windowFeatures
{
    WKFrameInfo *frameInfo = navigationAction.targetFrame;
    if (![frameInfo isMainFrame]) {
        [webView loadRequest:navigationAction.request];
    }
    return nil;
}

#pragma mark - WKNavigationDelegate
// 页面开始加载时调用
- (void)webView:(WKWebView *)webView didStartProvisionalNavigation:(WKNavigation *)navigation {
    REFRESHSATR(@"")
}
// 内容开始返回时调用
- (void)webView:(WKWebView *)webView didCommitNavigation:(WKNavigation *)navigation {
    REFRESHSTOP
   //返回按钮
    UIBarButtonItem *back = [UIBarButtonItem backItemWithImage:IMGNAME(self.backImageName) titleColor:self.navColor addTarget:self action:@selector(back) edgInsetStyle:MKButtonEdgeInsetsStyleLeft title:@"返回"];
    //关闭按钮
    UIBarButtonItem *close = [UIBarButtonItem closeItmeWithTitle:@"关闭" font:17 andColor:self.navColor addTarget:self action:@selector(backLatst)];
    if ([webView canGoBack]) {
        self.navigationItem.leftBarButtonItems = @[back,close];
    } else{
        self.navigationItem.leftBarButtonItems = @[back];
    }
}
// 页面加载完成时调用
- (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation {
    REFRESHSTOP
    self.navigationItem.title = webView.title;
}

-(void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler{

    NSURL *url = navigationAction.request.URL;
    NSString *scheme = [url scheme];
    if (![scheme isEqualToString:@"http"] && ![scheme isEqualToString:@"https"]) {
        REFRESHSTOP
        dispatch_async(dispatch_get_global_queue(0, 0), ^{
            if (@available(iOS 10.0, *)){
                [[UIApplication sharedApplication] openURL:url options:@{} completionHandler:^(BOOL success) {
                }];
            } else{
                [[UIApplication sharedApplication] openURL:url];
            }
        });
        decisionHandler(WKNavigationActionPolicyCancel);
        return;
    }
    if (navigationAction.targetFrame == nil) {
        [webView loadRequest:navigationAction.request];
    }
    decisionHandler(WKNavigationActionPolicyAllow);
    
    
}

#pragma mark - Getter/Setter
- (WKWebView *)webView{
    if (!_webView) {
        WKWebViewConfiguration *config = [WKWebViewConfiguration new];
//        NSMutableString *str = [NSMutableString string];
//        [str appendString:@"var header = document.getElementsByTagName(\"header\")[0];"];
//        //移除头部的导航栏
//        [str appendString:@"header.parentNode.removeChild(header);"];
//        WKUserScript *script = [[WKUserScript alloc] initWithSource:str injectionTime:WKUserScriptInjectionTimeAtDocumentEnd forMainFrameOnly:YES];
//        [config.userContentController addUserScript:script];
        _webView = [[WKWebView alloc]initWithFrame:CGRectMake(0, 0,MAINSCREEN_WIDTH, MAINSCREEN_HEIGHT ) configuration:config];
        _webView.backgroundColor = COLOR(whiteColor);
        _webView.scrollView.showsVerticalScrollIndicator = NO;
        _webView.scrollView.showsHorizontalScrollIndicator = NO;
        _webView.allowsBackForwardNavigationGestures=YES;
        NSString *url = self.webUrl;
        if (self.webUrl.length >4 && [[self.webUrl substringToIndex:4] isEqualToString:@"www."]) {
            url = [NSString stringWithFormat:@"http://%@",url];
        }
        NSURL *loadUrl = [NSURL URLWithString:url];
        _webView.navigationDelegate = self;
        _webView.UIDelegate = self;
        NSURLRequest *request = [NSURLRequest requestWithURL:loadUrl];
        [_webView loadRequest:request];
    }
    return _webView;
}

//MARK: - 视图生命周期
- (void)viewWillAppear:(BOOL)animated{
    [super viewWillAppear:animated];
    if (self.navigationController.navigationBar.barTintColor == COLOR(whiteColor)) {
        //状态栏字体黑色
        UIStatuBlackColor
    } else{
        //状态栏字体白色
        UIStatuWhiteColor
    }
    
}
- (void)viewWillDisappear:(BOOL)animated{
    [super viewWillDisappear:animated];
    REFRESHSTOP
}